pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 2

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

www.national.com
Features
Device-Specific Information
The following table compares features for the devices in the PC87591x family. The features listed below are a superset of
the PC87591x family.
Features
Flash Size
ROM Size
RAM Size
General-Purpose Input/Output Ports (GPIO)
Shared BIOS
RNG
Memory Protection
Processing Unit
— CompactRISC CR16B 16-bit embedded RISC pro-
— 2 Mbyte address space
Internal Memory
— Up to 128 Kbytes of on-chip flash memory (4 Kbytes
— Supports BIOS (flash) memory sharing with PC host
— On-chip flash is field upgradable by host, CR16B,
— Boot blocks for both CR16B and Host Code
— Memory contents protection and security
— Hardware-protected boot zone with block protection
— 2K (PC87591E/L) or 4K of on-chip RAM (PC87591S)
— All memory types can hold both code and data
Expansion Memory (Optional in 176-pin package)
— Up to 1 Mbyte of additional code and data
— Supports BIOS (flash) memory sharing with PC host
— Supports external memory power-down mode
— Field upgradable with flash or SRAM devices
— Supports host-controlled code download and up-
— Bus Interface Unit (BIU)
cessor core (the “core”)
of ROM in the PC87591L)
parallel interface or JTAG
circuit
date
Three address zones for static devices (SRAM,
ROM, flash, I/O)
Configurable wait states and fast-read, single-
cycle bus cycles
8- or 16-bit wide bus
(Continued)
Function
PC87591E
128-Pin
64K
NO
NO
NO
2K
62
–
2
Embedded Controller System Features
LPC System Interface
— Synchronous cycles, up to 33 MHz bus clock
— Serial IRQ
— I/O and Memory read and write cycles
— Bootable memory support
— Bus Master read and write cycles
— Reset input
— Base Address (BADDR) strap to determine the base
— LPCPD and CLKRUN support
— FWH Transaction support
Security Function Support
— Random Number Generator (RNG)
— Full Random using temperature, voltage and system
— Memory access protection
Host Bus Interface (HBI)
— Three host interface channels, typically used for the
— 8042 KBC standard Interface (legacy 60
— Intel 80C51SL compatible
— IRQ1 and IRQ12 support
— Fast Gate A20 and Fast Host Reset via firmware
— PM interface port (legacy 62
— ACPI Embedded Controller with either Shared or
— IRQ, SMI or SCI generation
PC87591E
176-Pin
address of the Index-Data register pair
noise.
KBC, ACPI Private or Shared EC channels
Private interface
YES
64K
NO
NO
2K
93
–
PC87591S
128-Pin
128K
YES
YES
NO
4K
62
–
PC87591S
176-Pin
128K
YES
YES
YES
16
4K
93
–
, 66
16
)
PC87591L
176-Pin
16
YES
YES
NO
4K
2K
93
, 64
–
Revision 1.07
16
)